Dear Colleagues,

Cold spraying is an emerging coating technology, and its development has been very active in recent decades. This technique is gaining even more interest in the whirlwind of additive manufacturing, with many research groups investigating the possibility of printing 3D parts using cold spray.

Cold spraying has potential in several industrial sectors and has proven valuable in restoration, repair, and corrosion and wear protection. The nature of coating formation is a solid-state process that opens up possibilities in the manufacturing of heat-sensitive materials and in additive manufacturing. The development and importance of quality are pushing cold spraying technology to the next level.

The number of publications available on this topic is continuously increasing, and the scientific community working on this topic is becoming larger day by day. There are different research streams: modeling of the process, modeling of the movement of the particles within the nozzle, design of the equipment, understanding of the physical phenomena occurring during the process, experimental studies to obtain the adhesion on new substrates, study of the deposition of new mix of powders, and so on.

Another interesting research stream is the deposition of metallic coatings on polymeric parts, both simple polymers and fiber-reinforced polymers, to enhance the application field of polymers. The aim of this Special Issue is to bring together all the studies dealing with the cold spray deposition of metallic particles on polymeric substrates. All kinds of papers will be welcome: experimental studies, theoretical papers, modeling papers, characterization of the coatings, and so on.

Thus, I cordially invite scientists and academics all over the world to submit original research papers and review articles on cold spraying, its latest developments, applications, as well as coating properties and performance.

In particular, the topics of interest include but are not limited to:

• New cold spray processes;
• Process assistance developments in cold spraying;
• Additive manufacturing;
• Feedstock material developments;
• New coating materials;
• Functional coatings;
• Coating properties and performance;
• Quality control;
• Corrosion and wear.

Dr. Antonello Astarita
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• cold spray
• metallic coatings
• polymers
• fiber-reinforced polymers
• modeling
• properties